Buddha-"There are these 4 castes-K,B,V,S;Of these 4 castes kshatriyas and the brahmins-are given precedence,to wit,in salutation, homage,obeisance, and due ministry"
~Kannakathala Sutta ,Majhim nikaya90

Ambedker: l Reject ThB,MB ,l am Bodhisattva ,l write my own
"B &his Dhamma" https://twitter.com/KPSharmaOli15/status/1343206089173520384

Ambedkaraites: Buddha and Buddhism Rejected CASTE ???

Buddha Never Rejected CASTE
CASTE is NOT problem
CASTE exploitation is Problem

How ever metaphysically buddha Rejected superiority of any one of them ,some where it is seen that buddha support that due to karmic accounts varna decided
Ex- In Jataka no 498, the origin of chandala(lowest race and the meanest of men, is traced to karma)

"When all our deeds were ripe as guerdon meet, we both as young
chandlas had our birth" (sakehi kammehi supapekhi canddla gabbhe
avasimha pubbe)

Regarding the purity of caste blood, in the
Ady. S. of the Maj.N ( 154/2)

"all castes are of equal purity"
(suddhim paccdgato)

IntheKutadantaSutta ,Dighanikaya136/5only the ksatriyas,brahmanas and householders are invited to attend the great
yajna (homam) organised by the king /(approved by the
Buddha- bloodless sacrifice)

And Some mordern BUDDHISTs are abusing Yagna https://twitter.com/RamaInExile/status/1342388224430284800?s=19

In Anguttaranikaya363/3, the Buddha describes the
goals in life of the three upper castes and makes no mention
of the goals of the sudras and pancamas ????

Namo Amitabha!